/*数组*/
#include <stdio.h>

int main()
{
    int i = 10;

    //Array
    int arr[10] = {21,22,23,24,25,26,27,28,29,30};

    while(i < 20)
    {
        printf("%d\n",arr[i - 10]);
        i++;
    }

    return 0;
}